LXR uboot/board/esd/ar405/flash.c

   1/*
   2 * (C) Copyright 2001
   3 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <common.h>
  25#include <ppc4xx.h>
  26#include <asm/processor.h>
  27
  28/*
  29 * include common flash code (for esd boards)
  30 */
  31#include "../common/flash.c"
  32
  33/*-----------------------------------------------------------------------
  34 * Functions
  35 */
  36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  37static void flash_get_offsets (ulong base, flash_info_t * info);
  38
  39/*-----------------------------------------------------------------------
  40 */
  41
  42unsigned long flash_init (void)
  43{
  44        unsigned long size_b0;
  45        int i;
  46        uint pbcr;
  47        unsigned long base_b0;
  48        int size_val = 0;
  49
  50        /* Init: no FLASHes known */
  51        for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  52                flash_info[i].flash_id = FLASH_UNKNOWN;
  53        }
  54
  55        /* Static FLASH Bank configuration here - FIXME XXX */
  56
  57        size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  58
  59        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  60                printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  61                        size_b0, size_b0<<20);
  62        }
  63
  64        /* Setup offsets */
  65        flash_get_offsets (-size_b0, &flash_info[0]);
  66
  67        /* Re-do sizing to get full correct info */
  68        mtdcr(EBC0_CFGADDR, PB0CR);
  69        pbcr = mfdcr(EBC0_CFGDATA);
  70        mtdcr(EBC0_CFGADDR, PB0CR);
  71        base_b0 = -size_b0;
  72        switch (size_b0) {
  73        case 1 << 20:
  74                size_val = 0;
  75                break;
  76        case 2 << 20:
  77                size_val = 1;
  78                break;
  79        case 4 << 20:
  80                size_val = 2;
  81                break;
  82        case 8 << 20:
  83                size_val = 3;
  84                break;
  85        case 16 << 20:
  86                size_val = 4;
  87                break;
  88        }
  89        pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
  90        mtdcr(EBC0_CFGDATA, pbcr);
  91
  92        /* Monitor protection ON by default */
  93        (void)flash_protect(FLAG_PROTECT_SET,
  94                            -CONFIG_SYS_MONITOR_LEN,
  95                            0xffffffff,
  96                            &flash_info[0]);
  97
  98        flash_info[0].size = size_b0;
  99
 100        return (size_b0);
 101}
 102